JPH03199814A - Combustion controller - Google Patents

Abstract

PURPOSE:To get a comfortable heating space by a method wherein an amount of combustion between a minimum amount of combustion and a combustion amount before one stage of the minimum amount of combustion is divided into several steps and changing-over of the number of divisions of the amount of combustion is carried out under a condition of inputting a difference signal between a present room temperature and a set temperature as well as a flame sensing signal. CONSTITUTION:As a present room temperature signal sensed by a room temperature sensing means 2 and a desired set temperature signal set by a temperature setting means 3 are inputted to a micro-computer 1, the micro-computer 1 calculates its temperature difference, sends an output corresponding to the difference value to a combustion control circuit 5 and controls the amount of combustion in six stages from its high state to its low state. A stage between the lower-most sixth stage and the fifth stage before it is divided into ten stages of combustion amount and further controlled. That is, the fifth stage combustion amount control signal is outputted to the combustion control circuit 5 and at the same time as a flame voltage from a flame sensing device 4 reaches a predetermined value, a signal is inputted from the micro-computer 1 to a dividing combustion control means 6 and then the combustion amount at the combustion part is made to the first dividing combustion lower than the fifth-stage combustion amount. As the flame voltage caused by this combustion continues at a value higher than a predetermined value for longer than a specified time, it is further transferred to the second dividing combustion and finally the combustion is lowered to the minimum amount of combustion at the sixth-stage.

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a combustion control device for a heater that heats a room.

<Prior art> Conventionally, in this type of equipment, the combustion amount has been controlled to high, medium, low, or high, medium, low, and stop depending on the deviation between the current room temperature and the set temperature. It was designed to maintain the room temperature at a set temperature.

<Problems to be Solved by the Invention> However, with this conventional system, when the difference between each combustion amount is large overall, when heating is to be obtained, a user feels uncomfortable when switching, and comfort is impaired. Even the lowest combustion amount is 1,500 to 1,300 kcal, and fine-grained room temperature control is difficult.Especially when transitioning from low combustion amount to combustion stop and vice versa, the temperature difference is extreme, so it is necessary to use a good combustion control system for the heater. All I got was less than 8 rice.

<Means for Solving the Problems> This invention focuses on this point, and in order to solve the above-mentioned drawbacks, the present invention has a structure in which the combustion amount is controlled according to the deviation between the current room temperature and the set temperature. , further comprising a subdivided combustion control means for finely subdividing the combustion amount into a plurality of stages between the minimum combustion amount and the combustion amount one stage before the minimum combustion amount; This is done on the condition that a signal is input from the flame detection device.

<Function> (1) (2) The current room temperature is detected by the room temperature detection means 2, and the desired room temperature is set by the temperature setting means 3, and the current room temperature signal detected by the room temperature detection means 2 and the temperature setting means are 3
The set temperature signal set by the microcomputer 1 is inputted to the microcomputer 1 (hereinafter referred to as the microcomputer), and the microcomputer 1 calculates the temperature difference between fiR and sends an output corresponding to the deviation value to the combustion control circuit 5 to control the combustion. The combustion amount is controlled in six stages from high to low, and the smaller the deviation between the current room temperature and the set temperature, the smaller the combustion amount. The combustion amount is further subdivided and controlled into 10 stages between the fifth stage combustion amount and the fifth stage combustion amount control signal is output from the microcomputer 1 to the combustion control circuit 5. The microcomputer 1 receives the flame voltage value from the flame detection device 4, and when this seven flame voltage reaches a predetermined value, the microcomputer 1 sends the flame voltage to the subdivided combustion control means 6.
A signal is input to the 1st #lI, which is approximately 1170kcal, which is 30kcal lower than the combustion amount in the 5th stage.
This is a differentiated combustion. Furthermore, when the 7-rhyme voltage caused by this first segmented combustion continues at a predetermined value for a certain period of time or more, the microcomputer 1 detects this and outputs the output to the segmented combustion control means 6 again to control the amount of combustion. The combustion amount is further shifted to the second subdivision combustion, which is 30 kcal lower, and is finally reduced to the lowest combustion amount in the sixth stage, which is about 900 kcal.

Therefore, by reducing the combustion amount to a low combustion amount, the combustion amount further decreases
This will allow for fine-grained combustion control and provide a more comfortable heated space.
Furthermore, since switching of the subdivided combustion amount is performed while checking the combustion state with the flame detection device 4, there is no worry about abnormal combustion caused by lowering the combustion amount, and the product can be used with confidence at all times. Moreover, it is economical as it saves fuel.

<Embodiment> Next, a combustion control device according to the present invention will be explained using a preferred embodiment shown in the drawings.

1 is a one-chip microcomputer having various functions such as memory, calculation, comparison, counting, and timer.

(3) Reference numeral 2 denotes a room temperature detection means consisting of a thermistor or the like, which detects the current room temperature and outputs this temperature signal to the microcomputer 1.

Reference numeral 3 denotes a temperature setting means that can freely set a desired room temperature, and is connected to the input side of the microcomputer 1 like the room temperature detection means 2, and inputs a set temperature signal to the microcomputer 1.

4 is a flame detection device consisting of 7 flame rods, etc.
It detects the combustion state of the engine (not shown) and controls the combustion, and also detects the seven-frame voltage and inputs it to the microcomputer 1.

5 changes the amount of combustion in the combustion section by 3 based on the output from microcomputer 1.
800.2700.2100.1600.1200.9
This is a combustion control circuit that controls 00kcal in 6 large steps, and here the rotation speed of a combustion fan (not shown) is designed to supply fuel proportional to the combustion air by applying static pressure to the fuel. is controlled by phase control.

Reference numeral 6 denotes a subdivided combustion control means which receives a signal input simultaneously with the fifth stage combustion amount output signal (4) one stage before the lowest combustion amount of the sixth stage from the microcomputer 1 to the combustion control circuit 5;
Up to the 6th stage combustion amount, the rotation speed is 3 Orpm, and the combustion amount is 3
A signal is output to the combustion control circuit 5 to subdivide combustion into 10 stages of 0kc'al, and a signal is output to the next stage when the flame voltage of the flame detection device 4 reaches a predetermined value after switching the combustion amount. In this case, the output is made on the condition that 4) continues for 2 seconds, that is, upon receiving a detection signal from the microcomputer 1.

Next, the operation of this embodiment will be explained with reference to the 70-chart shown in FIG.

First, operate the temperature setting means 3 to set the desired room temperature, and then press the operation switch (not shown) to start combustion.The amount of combustion at this time is at the initial stage of combustion, so the set temperature and room temperature Combustion is forcibly performed at the first stage combustion amount, which is the maximum combustion amount, regardless of the deviation from
The combustion amount is switched according to the deviation between the current room temperature and the set temperature, that is, the setting (
5) (6) The constant temperature and the room temperature detected by the room temperature detection means 2 are calculated and compared in the microcomputer 1, and when this deviation value becomes 3°C or less, the baking amount is switched to 2-stage m baking amount. Then, check to see if the deviation between the room temperature and the set temperature is 10°C or more, and if it is more than 100°C, set the combustion amount to 3rd stage, and further set the above deviation to +0.
If the temperature exceeds 5℃, the combustion amount becomes 4th stage, and then the deviation value increases by +1.
．． When the temperature exceeds 0"C, the combustion rate switches to the 5th stage combustion level, and as a result of this switch, the microcomputer 1 receives a flame voltage signal from the flame detection device 4, and when this voltage exceeds the predetermined value of 4■, the combustion rate is switched to 5-stage combustion. On the condition that the question continues, a signal is sent to the subdivision combustion control means 6, and the subdivision combustion control means 6 receives this signal and sends a signal to the combustion control circuit 5 to reduce the combustion amount by 30 kca from the fifth stage combustion amount.
The output is made to burn at the first subdivision combustion amount of 1200kcal, and the combustion amount is changed small.On the other hand, if the flame voltage is less than 4V or does not continue for 2 seconds, this will indicate poor combustion. Based on this judgment, the microcomputer 1 outputs an output to the combustion control circuit 5 to cause combustion to be performed at the combustion rate of the previous 4th stage, and then decreases the combustion rate from the 4th stage combustion level again in the same manner as above. After the first subdivision combustion, the first subdivision combustion amount is increased to 30kcal, provided that the flame voltage detected by the flame detection device 4 is 4V or more and continues for 2 seconds.
The second subdivision combustion of 1140 kcal is performed, and the third, fourth, fifth, sixth, seventh, eighth, and ninth subdivision combustion are performed sequentially under the condition that the flame voltage is 4 or more and continues for 2 seconds. The amount decreases, and during this time, the voltage is less than 4V.
If it does not continue for 2 seconds, it returns to the previous combustion amount and starts over, and if the flame voltage continues for 2 seconds with the 9th subdivision combustion amount at 4V or more, the final stage burns 9V.
It burns at a six-stage combustion amount, which is the minimum combustion amount of 0.00 kcal, and it goes without saying that if the deviation value changes during this period, the combustion amount is automatically switched to the combustion amount corresponding to each deviation value.

Therefore, since the combustion amount is subdivided into multiple stages for each minute combustion amount before the minimum combustion amount, fine-grained combustion control is possible, and there is no large change in the combustion amount that would occur at low combustion. , it is possible to obtain a more comfortable heated space without discomfort, especially as a heating device (7).

Moreover, since this switching to subdivided combustion is performed on the condition that the flame detection device 4 detects the normal state of combustion, it can be used with peace of mind without worrying about abnormal combustion, and it is possible to always perform good combustion. Moreover, the fine-grained combustion saves fuel and is economical.

In the present invention, the subdivided combustion control means 6 is provided outside the microcomputer 1, but it goes without saying that it may be provided within the microcomputer 1 to directly control the combustion control circuit 5.

<Effects of the Invention> In short, the present invention, in a device that controls the combustion amount according to the deviation between the current room temperature and the set temperature, finely solves the darkness between the minimum combustion amount and the combustion amount one step before this. The present invention is equipped with a subdivided combustion control means for subdividing the combustion amount into multiple stages, and the number of stages of the subdivided combustion amount is switched on the condition that the deviation signal and the signal from the flame detection device are input. When switching the combustion amount, the difference in the combustion amount is large, which is particularly worrisome.When the combustion amount is low (8), the combustion amount is finely set in multiple stages to reduce the difference. This allows for fine-grained combustion control and provides a natural and comfortable heated space, especially as a heating appliance.

Furthermore, since the above-mentioned switching of the subdivided combustion amount is performed on the condition that the normal combustion state is confirmed by the flame detection device, there is no need to worry about abnormal combustion that may occur due to the subdivision of the low combustion amount into multiple stages. It can be used with care and good combustion can always be obtained, and furthermore, by subdividing the low combustion amount, fuel can be saved and an economical combustor can be provided.

[Brief explanation of drawings]

FIG. 1 is a block diagram of a combustion control device according to an embodiment of the present invention, and FIG. 2 is a 70-chart diagram thereof.

Claims (1)

[Claims] In a device that controls the combustion amount according to the deviation between the current room temperature and the set temperature, subdivision is performed to finely subdivide the combustion amount into multiple stages between the minimum combustion amount and the combustion amount one step before this. What is claimed is: 1. A combustion control device comprising: a combustion control means, and the step number switching of the subdivided combustion amount is performed on condition that the deviation signal and a signal from a flame detection device are input.